CarnoriaHow Carnoria calculates
What each step calculates, to which standard and how it is checked. This page grows as each phase is released.
Building and climate
In developmentOutdoor heating design temperature and climate zone of each town. Floors, rooms with their use, area, height and indoor temperature, and building elements with their U-value, area, orientation and what lies on the other side.
IDAE technical guide on outdoor design conditions · CTE DB HE · RITE IT 1.1.4.1Heating loads
In developmentFabric loss through each element with the adjustment factors for unheated spaces and ground, thermal bridges, minimum ventilation, infiltration and, if requested, intermittent heating reheat.
EN 12831-1 · RITE IT 1.1.4.2 · CTE DB HS 3Underfloor heating
In developmentFloor heat output by floor covering, pipe spacing and screed; maximum surface temperature per zone; design room and flow temperature; flow rate, length and pressure drop of each circuit and manifold presetting.
EN 1264-2, -3 and -4Radiators
In developmentOutput at the real temperature difference from the rated output and the radiator exponent; number of sections or panel size; valve and lockshield.
EN 442Pipework
In developmentPipe sizes by velocity and pressure drop, fitting losses, index circuit, balancing, pump duty point and pipe insulation. With underfloor heating and radiators, mixing valve or a single temperature.
RITE IT 1.2.4.2.1Heat pump
In developmentOutput and COP interpolated between the test points by outdoor and water temperature, bivalent point, back-up and seasonal performance by temperature bins.
EN 14511 · EN 14825Running costs
In developmentConsumption of the heat pump and back-up, yearly cost with editable prices compared with a gas or oil boiler, CO₂ emissions with the official conversion factors and payback.
RITE recognised document: emission and conversion factors
How it is checked
Five reference cases (a flat with low-temperature radiators, a two-storey house with underfloor heating, a home with underfloor heating and bathroom radiators, a small office and a refurbishment with existing radiators) are calculated twice: with the app and with an independent program written from scratch. A phase ships when both agree within 2 % and the difference is explained.
“Design” tables
Some UNE standards are not public. Until we have the official text of a table, the app marks it as a “design” value, cites where the value comes from and says so in the report.
We will tell you when it opens
One email when Carnoria calculates its first complete project. Nothing else.